<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>1_非受控组件</title>
</head>
<body>
  <!-- 准备好一个"容器" -->
  <div id="test1"></div>

  <!-- 引入React核心库 -->
  <script type="text/javascript" src="../js/react.development.js"></script>
  <!-- 引入react-dom，用于支持react操作DOM -->
  <script type="text/javascript" src="../js/react-dom.development.js"></script>
  <!-- 引入babel，用于将jsx转为js -->
  <script type="text/javascript" src="../js/babel.min.js"></script>
  <!-- 引入prop-types，用于对组件标签属性进行限制 -->
  <script type="text/javascript" src="../js/prop-types.js"></script>

  <script type="text/babel">
    // 1.创建组件
    class Login extends React.Component {

      handleSubmit = event => {
        event.preventDefault()    // 阻止表单提交
        const {username, password} = this
        alert(`你输入的用户名是：${username.value}, 你输入的密码是：${password.value}`)
      }

      render() {
        return (
          <form action="http://www.atguigu.com" onSubmit={this.handleSubmit}>
            用户名：<input ref={c => this.username = c} type="text" name="username"/>
            密码：<input ref={c => this.password = c} type="password" name="password"/>
            <button>登录</button>
          </form>
        )
      }
    }

    // 2.渲染组件到页面
    ReactDOM.render(<Login />, document.getElementById('test1'))
  </script>
</body>
</html>
